US 4,730,813 A · Oxygen nozzle for metal refining

Abstract

A nozzle for refining metals or ferroalloys by oxygen blasting from above the melt is presented. The nozzle terminates at a nozzle head and includes at least one central blast pipe for directing a jet of oxygen having supersonic speed. A chamber is interposed between the mouth of the blast pipe and the mouth of the nozzle head. This chamber widens progressively from the mouth of the blast pipe, and narrows toward the mouth of the nozzle head. At least one opening from at least one lateral duct opens to the chamber in the vicinity of the blast pipe mouth. Each lateral duct is connected to a source of gas, and includes an inidividual flow control valve. Preferably, at least three lateral ducts are arranged symmetrically around the blast pipe mouth.

Claims9

Dependent claims

A nozzle for use in refining metals or ferroalloys which includes a nozzle head terminating at a first mouth, the nozzle also including therein at least one blast pipe terminating at a second mouth, the blast pipe being adapted for directing a jet of refining oxygen, said nozzle further including:

chamber means interposed between said second mouth of said blast pipe and said first mouth of said nozzle head, said chamber means widening progressively from said blast pipe second mouth and narrowing toward said nozzle head first mouth;
and
at least one lateral duct communicating with said chamber means at an exit opening in the vicinity of said blast pipe second mouth, each of said at least one lateral ducts being associated with flow control valve means and being adapted for connection to a source of gas.

Dependencies are inferred from the claim text.

Oxygen nozzle for metal refining

Life of this patent

Oxygen nozzle for metal refining

Life of this patent

Abstract

Claims9